Linksys SPA 900 SERIES manual Field Description

Chapter 5 Linksys IP Phone Field Reference

SIP Tab

Field	Description
Reg Retry Random Delay	Random delay range (in seconds) to add to <Register Retry Intvl> when retrying
	REGISTER after a failure. This feature was added in Release 5.1.
	Defaults to blank, which disables this feature.
Reg Retry Long Random Delay	Random delay range (in seconds) to add to <Register Retry Long Intvl> when retrying
	REGSITER after a failure. This feature was added in Release 5.1.
	Defaults to blank, which disables this feature.
Reg Retry Intvl Cap	The maximum value to cap the exponential back-off retry delay (which starts at <Register
	Retry Intvl> and doubles on every REGISTER retry after a failure). In other words, the
	retry interval is always at <Register Retry Intvl> seconds after a failure. If this feature is
	enabled, <Reg Retry Random Delay> is added on top of the exponential back-off adjusted
	delay value. This feature was added in Release 5.1.
	Defaults to blank, which disables the exponential back-off feature.
Sub Min Expires	This value sets the lower limit of the REGISTER expires value returned from the Proxy
	server.
Sub Max Expires	This value sets the upper limit of the REGISTER min-expires value returned from the
	Proxy server in the Min-Expires header. Defaults to 7200.
Sub Retry Intvl	This value (in seconds) determines the retry interval when the last Subscribe request fails.
	Defaults to 10.

	Linksys IP Phone Administrator Guide
5-12	Firmware Version 5.1